Incinerating-furnace.



F. 'L. STEARNS.

Patented Oct. 18, 19 10.

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fiy fi ATTORNEY P. L. STBARNS. INGINBRATING FURNACE. APPLIOATIOI? rum) JULY 29, 1905.

Patented Oct. 18, 1910.

4 BHEETS-BHEET 2.

F. L. STEARNS.

Patented Oct. 18, 1910.

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INVENTOR ATTORNEY J 7 I 1 %%////===W//////// WITNESSES:

STEARN S.

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T N FURN ED JUL INCINERA APPLICATION Patented 00a. 18, 1910.

4 SHEETS-SHEET 4.

BY p WW ATTORNfi WiTHESSES:

m 4 J14 m) 4/?? w FREDERICK L. STEARNS, OF NEW YORK, N. Y.

INCINERATING-FURNACE.

Specification of Letters Patent.

Patented Oct. 18, 1910.

Application filed July 29, 1905. Serial No. 271,765.

To all whom it may concern:

Be it known that I, FREDERICK L. S'rnARNs, a citizen of the United States, residing in the borough of Manhattan, in the city and State of New York, have invented certain new and useful Improvements in Incinerating-Furnaces, of which the following is a specification.

The objects of the present invention are to provide an incinerating furnace for burning ordinary refuse and garbage, or either separately, the furnace being compact, economical and substantial.

The furnace is so constructed that the matter to be burned is substantially, if not entirely, reduced to ash, and is provided with a system of fines having heat retaining and radiating walls for the purpose of securing a practical combustion of the noxious gases within the furnace.

My invention consists of certain features of construction and combinations of arts to be hereinafter describedand then cl aimed.

In the accompanying drawings, which illustrate a desirable form of my invention, Figure 1 is a horizontal section of an incinerating furnace embodying my invention, which section is through the ash pits and flues in the lower portion of the furnace, line 11 of Fig. 2. Fig. 2 is a longitudinal vertical section on line 2-2 of Fig. 1, clearly showing the main combustion-chamber. Fig. 3 is a longitudinal vertical section on line 33 of Fig. 1. Fig. 4 is a longitudinal vertical section on line H of Fig. 1. Figs. 5, 6, 7 and 8 are respectively vertical transverse sections on line 5-5, 6-6, 7-7, and 8-8 of Fig. 1.

Referring to the drawings, the furnace walls are made of any suitable fireproof material. The main combustion-chamber b preferably extends longitudinally of the furnace in the direction of the chimney o and is provided with stoking-doors b, b and b. At the top of said chamber are feed-holes d, d. The bottom of the main combustion-chamber 1) consists of three parts. In the middle there are grates 0Z the bars of which are preferably widely separated, as shown in Fig. 6. In the outer end of the main combustion-chamber is a grate d preferably at the same level as grate d and the bars of which extend lengthwise of the combustion-chamber and are preferably closely arranged together, as shown in Fig.

5, while the inner end of the main combustion-chamber is formed with an inclined table e for the purpose of receiving the garbage .charged into the furnace. The utility of these parts will become apparent hereinafter. The adjacent ends of the gratebars of the two grates (Z (1 rest upon a transverse support (1*.

Extending transversely of the main combustion-chamber Z) and located under the grates cZ is a supplemental combustionchamber f, Figs. 2, 4 and 6, which is provided with a stoking-door f. This supple mental colnbustionchamber is provided with a bottom grate f*, the bars of which are shown as, but are not necessarily parallel with the bars (Z but are preferably more closely spaced together. Under the supplemental combustion-chamber is its ash pit 9 provided with a cleaning out door 9. The main combustion -chamber 1) is preferably provided at one side of its outer end with a coal-burning chamber 71, Figs. 3 and 5, which connects with the main combustion-chamber by means of an opening It in the side wall of said chamber. This coalburning chamber i1. is provided with a coalcharging door [L a grate h, an ash pit h, and a door h.

To one side of the forward end of the supplemental combustion-chamber f is preferably located a. coal-burning chamber 2', Fig. 4, which is provided with a coal-charging door 21 a grate 71 an ash pit i and a cleanin'g out door 71'; the said coal-burning chamber i communicates with the side of the supplemental combustion-chamber through an opening i In the furnace forming the subject of the present invention are preferably separate fines from the main combustion chamber and the supplemental combustion-chamber which do not converge and then pass directly to the chimney, but they first. converge and then the products of combustion and hot gases are divided and caused to pass through diverging flues, which afterward converge, and the products of combustion then passthrough a flue leading directly to the chimney. Above the drying table 6 of the main combustion-chamber and at one side of the latter, communicates a laterally and downwardly extending flue j, while a lateral flue j extends from the rear ,end of the supplemental combustion-chamber f, these two flues j and 7' converging, while from their place of convergence there J The furnace described and shown is 'erated as follows:

extends transversely-of the furnace and under the main combustion-chamber a flue k,

Fig. 7, and a downwardly extending flue this downwardly extending flue is? communicates by means of an opening Z with a transverse flue Z Fig. 6, which transverse flue is located under and extends parallel with the supplemental combustion-chamber and its ash pit. The opposite end of the transverse flue Z communicates by means of an opening Z with a flue l theexit end of this flue being disposed'ad'acent to the exit end of the transverse flue before referred to, so that at the'place of convergence of the two flues k and Z the divided hot products of combustion and ases again meet. The flue h before referre to, and the flue l communicate by means of an opening at at one end of the flue k with a second and parallel transverse flue m Figs. 1, 4 and 8. these two flues k and m being located under the inclined drying table 6 of the main combustion chamber. and causing the hot products of combustion and gases to pass twice under the drying table, so that the latter is sufliciently heated, both top and bottom. The flue m communicates by means of an opening m 'with the base of the chimney c. Opposite the point of communication of the flue k and the flue Z there is arranged in the wall of the furnace a cleaning out door n.

op The refuse" to be destroyed is fed into the furnace either through the two feed-holes d d at the top, through the feed and stoking door 12 in the rear of the main combustion-chamber, through the feed and stoking door 6 at the side of the main combustion-chamber, -or through the large door 6 at the front end of the main combustion-chamber. The drier or more combustible material is charged into the forward end of the furnace, while the wetter or less combustible material is fed into the rear thereof. The burning drier material in the front of the main combustion-chamber furnishes heat to burn the less combustible material in the rear. Upon stoking the material in the main combustion-chamber, the burning material falls through the large spaces in the grate (1 into the supplemental combustion-chamber, where the combustion is completed. Upon stoking in the supplemental combust-ion-chamber f only the ash should fall to the ash pit below.

If the material to be destroyed does not produce a sufliciently high temperature in the furnace, then a coal fire is started on one or both the coal fire grates h 1?, the heat from the coal-burning chamber k entering the main combustion-chamber near the front, and the heat from the coal-burning chamber a entering the front end of the sup plcmental combustion-chamber. The heat from these coal fires will produce a temperature high enough to practically destroy the .ing coal when t e refuse to be destroyed is quite moist, but it is-ordinarily used for burning the more combustible material.

The rear end of the main combustionchamber 6 forms a storage place above the garbage drying table e and in this space the material is dried by the radiation of heat from the walls inclosing the space, which heat is increased by the transverse flues is, m, underthe drying table. This increased heat serves for the consum tion of gases which slowly arise from the burning refuse. The objectionable refuse is fedinto this storage space in therear door at a point back of the exit flue of the main combustionchamber, and after the bulk of the gases have risen slowly and have passed forward uniting with the hot gases, this refuse is pushed forward onto the grates and into the hotter portion of the main combustionchamber. The products of combustion from all the fires and combustion-chambers unite, and then separate, pa'rt going around the flue I? under the ash pit of the main combustion-chamber, and part'going through the transverse flue I: under the drying tables The object of thus dividing the products of combustion is'to allow part of the gases to pass under the ash'pit, and the remainder to make the more direct circuit to the chimney 0, thus lessenin the chances of a back draft, especially w en starting the fires. Another object in so dividing the products of combustion is to have the hot flue under the ash pit g, and also under the drying table in the rear of the main combustionchamber to aid the combustion or evaporation in the main combustion-chamber and the supplemental combustion-chamber. The products of combustion, after thus dividing through the branch flues, reunite and pass through the flue m under the storage space and drying table 6 and thence out to the chimney. The described flues, of a very high temperature, substantially complete the combustion of the objectionable gases, and by the many turns and windings deposit the particles and soot carried in suspension.

Without restricting myself to details, as some features may be-omitted and others used in combination with other parts, roducing equivalent results, and their orm and construction modified, what I claim as my invention covering improvements in incinerating .or refuse furnaces and desire to secure by Letters Patent, is-

1. The combination of a main combustionchamber having a grate, a supplemental combustion-chamber, located under the said grate and extending crosswise of the main combustion-chamber and also having a grate, and two combustion-supportin or coalburning chambers, one for @351 of said combustion-chambers located near one end and laterally to one side only of its given combustion-chamber, and having an opening into the side wallof its given combustion-chamber; said combustion-supporting or coal-burning chambers being arranged in a vertical lane, transversely of'the main combustion-c amber, at the outer side of the supplemental combustion-chamber, and said openingsbeing located in the forward lower corners of the main combustion-chamber and the sup lemental combustion-chamdrying-table, su

ber, substantial y as and for the purposes set forth. I

2. The combination of a main combustionchamber, a supplemental combustion-chamber, a drying-table for'the main combustionchamber, an outlet flue leading from the said main chamber, and a system-of flues connected with said outletflue and arranged to extend in part-under the supplemental combustion-chamber and in part under the drying-table to compel portions of the-hot products of combustion to separately pass under the supplemental combustion-chamber and from the main-combustion-chamber, to re-unite, and to ass at least once under the stantially as and for the purposes set forth. 0

3. The combination of a main combustionchamber' and its grate','a supplemental combus'tion-chamber under said grate and into which some of the material on said rate is directly discharged, an outlet flue eadmg from the' main combustion-chamber, two

fluesbranching from-said outlet flue and. re-united at their outer ends ,one of the same passingunder and parallel with the supplementa combustion-chamber, and a forth.

single flue leading from the re-united ends of the branch flues, for substantially the purposes set forth;

4. The combination of a main combustion chamber having a grate, an outlet flue leading therefrom, two branch flues from said outlet flue, both of which extend under the main combustion-chamber and are re-united at their outer end, a second outlet flue leading from the re-united ends of the branch flues, and a supplemental combustion-chamber and its ash-pit arranged under the main combustion-chamber and communicating therewith through the rate openings and also communicatin wit said branchflues, one of which branc flues extends under the supplemental combustion-chamber, for substantially the purposes set forth.

5. The combmation of a main and a sup-- plemental combustion-chamber and a suitable system of flues leading therefrom, one of said flues leading directly om the main combustion-chamber, another from the supplemental combustion-chamber, said flues communicatin with each other, two other of the aforesaid system of flues branching from the point of communication of the said flues of the main and supplemental combustion-chambers, one of, said branch flues extending under the" main combustion-chamber, and the other of said branch flues extending under the su plemental combustionchamber, said brancli flues re-uniting, another of the first said system of flues extending from the point of communication of the outer ends of thebranch flues under the main combustion-chamber and parallel with the branch flues, and the last of first said system of flues extending to the chimney, for substantially the purposes set Signed at New YorkQN. Y. eases day of July 1905.

FREDERICK L.

Witnesses:

Gno. L. Wnnnnoox, TnoMAs H. Low.

STEARNS. 

